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论文类型： 期刊论文

发表时间： 2014-10-01

发表刊物： IEEE COMMUNICATIONS LETTERS

收录刊物： SCIE、EI、Scopus

卷号： 18

期号： 10

页面范围： 1835-1838

ISSN号： 1089-7798

关键字： Antenna selection; Euclidean distance antenna selection (EDAS); spatial modulation; rotational symmetry

摘要： Euclidean distance antenna selection (EDAS) is an effective transmit antenna selection technique for spatial modulation (SM). However, since an exhaustive search over both the antenna set and the set of conventional constellation points is executed, the computational complexity required to find the optimal solution of EDAS is too high for practical applications. In general, digital modulation constellations have rotational symmetry. In this letter, it is shown that the symmetric constellation points have the same value as EDAS. Hence, only one search is enough for the symmetrical constellation set. Using this proposition, we propose a fast algorithm to find the optimal EDAS solution, which exhibits lower computational complexity than the conventional EDAS solution.